Former Prime Minister Dame Jenny Shipley and four other Mainzeal board members are accused of failing to appropriately assess the company's financial position, according to the liquidators suing them.
Shipley and fellow Mainzeal directors Richard Yan, Peter Gomm, Clive Tilby and Sir Paul Collins and Siew Kwan are defending a lawsuit from the construction group's liquidators accusing them of reckless trading and alleging they breached their duties.
More details of the lawsuit emerged this week after Chief High Court Judge Geoffrey Venning allowed access to court documents in the case.
The liquidators say Shipley, Yan, Gomm, Tilby and Collins failed to make an appropriate assessment of Mainzeal Property and Construction's financial position and the implications of it continuing to trade after July 2011, when it allegedly failed a limb of an insolvency test.
By allowing Mainzeal Property and Construction to continue to trade after July 2011 until its collapse in 2013, the liquidators say the five board members caused a $47.4 million increase in the company's liability to its creditors.